(a species of owlet moth (Noctuid)) Some caterpillars, after they emerge from their egg, can increase their weight by 25,000 times.

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Take part in the survey

Find out about the urban tree survey, why it's important, and how to take part.

  • View of trees in Nottingham
    About the tree survey

    The urban tree survey is a nationwide survey of trees in urban areas, including gardens. Find out why it matters and how you can contribute to our understanding of the UK's biodiversity.

  • Someone doing the tree survey in their local park
    How to do the survey

    Follow our simple instructions to identify trees and complete a survey. All you need is here, including the survey's tree identification key and tips from our scientists.

  • Record your tree on our urban tree survey map
    Record your results

    Put your trees on the map. Tell us what and where they are by placing a tree pin on our online results map.

  • Cherry trees in a park
    Cherry tree survey

    Help us find out where cherry trees are growing in Britain and when they are flowering.

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